> I recently did some searching on the topic of high availability and
> the service replication and stumbled across DRBD, some kind of
> network RAID-1. DRBD mirrors partitions between two machines in a
> completely transparent way. I have no idea if and how well this
> works (the mailing-list traffic suggests that it does work), but I
> find the idea brilliant. It makes rsync unnecessary and even works
> for services that don't have any replication functionality at all.
>
I can vouch for this one..... it even makes sense for extra-low-cost
dual node configurations with a degraded server (DEGRADED=== really
small PC that will provide bitch slow service, but thats better than
none at all) for example, for single webmail servers. Its a whiff to
configure with heartbeat and all....pretty cool stuff
I use it in a somehow similar (to what i described above) setup with
about 10/15 thousend mailboxes and vhosted homepages.
> You can find some descriptions as well as a download link at the
> following URL:
>
> http://www.complang.tuwien.ac.at/reisner/drbd/
>
> If you decide to give it a try, I'd be very interested to hear from
> your experiences.
>
> Regards,
>
> Oliver
--
Alex Borges (lex) <alex@sogrp.com>
Step One Group